2020年3月6日 · we had had dinner before they arrived和？ 有区别 第一个是过去完成时，第二个是一般过去式。 而且你的第二个句 …
1. 介词Before 句型中的时态理解. 1. We managed to arrive at the hall before the concert had started. 2. He came in …
after. We use after + past perfect to talk about an action that happened before something else. After the exams had …
也就是說，have had / has had 裡面的「have/has」是現在完成式裡面的助動詞；而 have had / has had 裡面的「had」則是 Have 的 …
2012年5月2日 · With the past perfect, it’s possible to have the structure “had had” and “hadn’t had” in a sentence, …
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